any reason to scan PXI-2575 and SCXI-1127 in a particular order?

[bradj0]

Hello-

Is there any reason to prefer one scan-list order over any other? specifically is it better to scan through ch0, ch1, ch2, etc rather than randomly?

It doesnt seem like it would matter.. but many DAQ devices behave strangely if you scan them in ascending order (eg 0, 1, 2) and thus I always scan them in descending (e.g. 7, 6, 5, ...)

thanks-
brad

[Travis_W]

Brad,

Simply based on the switch modules, there should be no difference in which scan list is prefferable.

Can you elaborate on the strange behavior you have seen on some DAQ devices?  The only interesting behavior I can recall that may be fixed by scan order is when certain channels are saturated and "ghost" onto other channels.  If this is the case, follow the steps in the linked KnowledgeBase to remedy the problem.

What data acquisition device are you using along with your switch modules?  What types of signals are you measuring?

Have a great day!
Travis W